Just after 4pm on Wednesday 12 August, a family were walking through the grounds of Mother Shipton’s Cave when a member of the family saw the naked man stood on a hill. It was seconds later that they noticed the man was also performing a lewd act.
On realising he had been seen, the naked man walked off into some bushes.
The man is described as white, aged in his 60s, around 6ft tall, of slim build, and possibly had grey hair.
Police are appealing to anyone who witnessed the incident or has any other information that could assist the investigation, to contact them.
Please quote reference 12200139420 when passing on information.